Seam for sewed articles.



J. G. LEWIS.

'SEAM FOR SEWED ARTICLES.

APFLICAHON FILED IAN. 30. 1914.

. Patented Jul 25, 1916.

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Jenn" a. Lewis,

or en. LOUIS, rurssounr.

BEAM F01 3, SEWED ARTICLES.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed January 30, 191% Serial No. 815,398.

To all whom it may concern Be it known that I, JOHN G. Lewis, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented certain new and useful Improve ments in Seams for Sewed Articles, of which the following is a specification.

My invention relates to seams for sewed articles and more particularly to a concealed effect blind stitch'felling seam wherein-a Superimposed layer of material, usually presenting a turned under edge, is united to a subjacent base. layer by two connected rows of lock stitches in such fashion that the stitching is wholly concealed on the fair or right side of the work and the display of thread upon the stitch side of the work is minimized.

' One of the special objects of my invention is to provide a seam of the character described, wherein only one thread of the two employed in forming the lock stitch will cross the edge of the superimposed layer, and the distance of its travel across the surface of the superimposed layer back from the edge will be substantially uniform regardless of the thickness of the material operated upon, and regardless of variations of such thickness.

In the drawing wherein I have illustrated an embodiment of my invention, Figure, 1 is a perspective view with parts broken away showing in exaggerated form a seam constructed in accordance with my invention; 'Fig. 2 is a plan view and Fig. 3 is a transverse section on line 33 of Fig. 2.

In the drawing 10 indicates in general a base layer of fabric, and 11 a superposed fabric presenting at 12,.an edge, which usually is a folded edge formed by underfolding a border portion 11 of the fabric.

This superimposed fabric is united to the base fabric by two connected rows of lock stitches, both of which are when viewed in plan, parallel to the edge, the stitches of one row being local to the base layer and lymg close to the line of the edge 12, either under, at or slightly beyond the same, and the stitches of the other row being laid in the superimposed fabric, penetrating the same through and through at a short distance,

substantially uniform as to the successive stitches, back from the edge. K

In the specific construction shown at represents the needle thread and b the bobbin thread, each stitch being made in the usual fashion to interlock the two threads and the thread lock being located at any desired point at the surface on or Within the goods.

In the construction of the seam shown a blind stitch 13 is taken in the base layer of goods close to the edge and in a vertical plane, parallel thereto; the needle is vi-v two rows of stitches are close together and it will be observed that when the threads are tightened by suitable tension, substantially all of the running connections of one of the threads, lying on the base fabric, will be concealed in the space between the superimposed and base layer; only the other thread,

which in the illustration shown, is a bobbin thread, crossing the edge. in forming such a scam the needle should becaused to penetrate thesuperimposed material, in a vertical plane parallel to the edge, from below upward, (or fromvthe top surface downward if so desired) without twice penetrating the folded edge. To further such single penetration the border portion of the super-imposed layer at and beyond the point where the needle is acting may be rolled back, as best shown-in Figs. 1 and 2.

It will be observed that by the construction of a seam as above described, the width of the overseam will be made substantially independent of the thickness of the goods operated upon, and a seam of very neat and regular appearance will be produced, the overseaming being substantially no wider where the goods of the superimposed layer are thickened as by a cross seam than at any other point.

While I have herein described in some detail a particular embodiment of my invention, it will be apparent that changes therein might be made without departure from the spirit and scope of my invention within the scope of the appended claim.

What I claim is a A hem or seam for sewed articles comprising a base layer, an edge-presenting superimposed fabric, and two connected rows of lock stitches, one thereof local to the base layer, the other local to the superimposed fabric, all stitches of both rows lying, in their portion penetrating the goods, parallel to the direction of the seam, thereby to dispose the emergence points of the stitches always at the same distance from the edge-line regardless of variations 

